Compairson optimization?

what about:

if(!(A+B))
  {
  // all the stuff that you have after each if  
  }; 

Better question: Does it matter? This is a micro-optimization that the compiler will most likely take care of for you.

I would go with "if((A+B)<0)", just because it''s easier to read. Having your program run a couple microseconds faster is in most cases second to having clear and simple code, because it will reduce debugging time in the long run.

You don''t have to be so picky. First of all, I said "in most cases," and most of your code probably isn''t in your innner loop (well, no in my project anyway).

And when I said a couple of microseconds, I didn''t mean to imply that "if((A+B)<0)" would take a couple of microseconds more than "if(A<-B)." I was ''speaking'' in generic terms.